From a7712e8c71aef8403836fbd27dc01995c033d4ac Mon Sep 17 00:00:00 2001
From: chad <chasd00@gmail.com>
Date: Thu, 13 Nov 2014 11:36:13 -0600
Subject: [PATCH] prevent divide by zero error when calculating a circumference

---
 src/Chart.Doughnut.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/Chart.Doughnut.js b/src/Chart.Doughnut.js
index 35de93c7f..5044be604 100644
--- a/src/Chart.Doughnut.js
+++ b/src/Chart.Doughnut.js
@@ -108,8 +108,12 @@
 				this.update();
 			}
 		},
-		calculateCircumference : function(value){
-			return (Math.PI*2)*(value / this.total);
+		calculateCircumference : function(value) {
+			if ( this.total > 0 ) {
+				return (Math.PI*2)*(value / this.total);
+			} else {
+				return 0;
+			}
 		},
 		calculateTotal : function(data){
 			this.total = 0;
@@ -181,4 +185,4 @@
 		defaults : helpers.merge(defaultConfig,{percentageInnerCutout : 0})
 	});
 
-}).call(this);
\ No newline at end of file
+}).call(this);